I have been searching through the Ask Ubuntu and Elementry OS Forums and there is nothing about getting this issue fixed. When I Hold Function and Press up and down the Brightness slider moves but there is nothing happening. Can someone please help me with this issue. I have added my Computer specs below.

Check the value of max_brightness. Then you can set your brightness with any value between 0-max_brightness. To change brightness execute on terminal sudo echo XX> /sys/class/backlight/intel_backlight/actual_brightness , where XX is the number you want. If that doesn't work, try the same command with brightness instead.
– MaccerJun 7 '17 at 13:11